$OpenBSD: patch-simgear_misc_sg_path_cxx,v 1.1 2015/03/17 17:20:17 pascal Exp $
--- simgear/misc/sg_path.cxx.orig	Sat Jan  3 19:30:47 2015
+++ simgear/misc/sg_path.cxx	Sat Jan  3 19:36:10 2015
@@ -30,6 +30,7 @@
 #include <stdio.h>
 #include <sys/stat.h>
 #include <errno.h>
+#include <unistd.h>
 #include <fstream>
 
 #ifdef _WIN32
